Valve head



F b, 10. 1925. I

N. M. SMALL VALVE HEAD Filed March 20, 1922 il WM n vlmlqmmm .mm glgwuentoi NormanM 5111a" patented Feb. 10, 1925.

UNITED STATES PATENT OFFICE.

NORMAN lvI. SMALL, OCB" IVAYNESBORO, PENNSYLVANIA, ASFsIGNOR TO ERICKCOM- PANY, OF WAYNESBORO, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

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Application filed March 20, 1922. Serial No. 545,173.

ToaZZ whom it may concern:

Be it known that I, NORMAN M. SMALL, a citizen of the United States,residing at Waynesboro, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Improvements in ValveHeads, of whichthe following is a specification.

My said inventionrelates to a valve head intended for use inrefrigerating or other pipe lines where a tight joint is essential orWhere it is necessary to use some specific material to avoid corrosion.It is an object of the invention to provide a valve head in which thereshall be automatic compensation for wear and the effectiveness of whichshall increase rather than decrease with wear.

Referring to the accompanying drawings which are made a part hereof andon which similar reference characters indicate similar parts,

Figure 1 shows a side elevation of a valve embodying the features of mydevice with parts broken away to show my invention in vertical section,and

Figure 2 is a fragmentary View showing the relation of parts after theseat has been worn down to a considerable extent.

In the drawings 10 indicates a valve casing of any desirable typeenclosing a stem 11 with a handle 12. The stem has a swivel connectionat its lower end with a head or button 13, the latter having an axialcavity enlarged at its upper end to receive a flange 14: on the stem andthe head being held in place on the stem by a nut 15 threaded into itand bearing against the upper side of the flange. At its underside 16the head is appropriately formed and the valve face rests in a tubularseat 17, a raised rim or head 18 being formed about its upper edge.

The parts thus far described are old and well-known in the art, theinvention residing in the structure of an annular insert 19 which formsa wear compensating device between the head and the seat and which actsas a packing to insure close contact. This annular member is made ofsoft metal or a soft metal composition or may in some instances beformed of vulcanized fiber or the like, according to the exigencies ofthe situation. Preferably it has a flange 20 extending over and beyondthe rim of the seat though this may be dispensed with in some instances.It will be: ad that the circumferential face of the member 18 forms acontinuation of the face at the lower end 16 of the head and ispreferably reamed at the point of contact to make a slight flat of thesame taper as the soft part that fits into it.

It will be seen that as the annulus wears away there will be anincreasing extension of the annulus 19 out over the rim 17 of the seatand that when the parts become sufficiently worn as in Figure 2 the rimwill engage the lower face of the flange 20 thus greatly prolonging thelife of the valve and insuring a tight contact until the wear hasextended substantially through said flange 20. It will be understood, ofcourse, that the invention may be used with a valve having its head andstem solid as well as with the head swiveled to the stem.

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent, is:

1. A valve comprising a tubular seat having a rim formed about its upperedge, a head having an insert of softer material adapted to contact withthe wall of the tubular seat said insert having an extension adapted tocontact with the said rim portion of the seat, substantially as setforth.

2. In a valve, a tubular seat, a head therefor and an insert of softermaterial in said head said insert having a portion contacting with saidtubular seat and having another portion extending beyond the edge ofsaid seat and substantially at right angles with the said tubular seatportion and adapted to contact with said edge, substantially as setforth.

3. In a valve, a tubular seat having a beveled contact surface and anupper rim portion, a head therefor and an insert of softer material insaid head said insert being beveled to correspond to that of the seat,an eX- tension on said insert adapted to contact with the rim portion ofthe seat upon partial wearing of the contact surface of the head orseat, substantially as set forth.

t. In a valve, a tubular seat, a valve head having a part extending intothe seat and an insert of softer material contacting with the tubularpart of the seat and having a portion extending outwardly beyond theedge of the seat adapted to contact with said edge upon partial wearingof the contact surface of the head or seat, substantially as set forth.

5. In a valve, a tubular seat having an upstanding rim t-hereabout,ahead resting therein, an insert of softer material in the head at thepoint of contact with the tubular seat and having a flange extending atsubstantially right angles with the axis of the tubular portionoutwardly beyond the rim of the seat to contact with said rim,substantially as set forth.

6. In a valve, a seat having an annular rim, extending upwardlytherefrom, a valve head having a. tapered extension to enter said seat,anda flatface extending outward from said extension beyond the rim, saidhead having an insert of softer material at the point of contact withthe seat and said insert having a flange extending beyond saidupwardlycrte led rim adapted toiseai on said rim, subs ially as setforth.

7. Ina valve, a tubular seat having a raised rim thereahout, aheadtherefor and an insert of softer material in said head contactingwith the tubular portion of the seat said insert having a portionextending out-, wardly beyond the rim and contacting therewith,substantially as set forth.

8. A valve comprising a head, a reduced rounded extension on said headand flat face surrounding said reduced extension said head having aninsert of soft material forming a portion of said extension and eX-tending outwardly therefrom to form at least a portion of the flat face,substantially as set forth.

9. A valve construction comprising a seat having an annular upstandingrim and a substantially cylindrical valve head having a dome shaped endwith an annular ledge surrounding said dome adjacent its base, said headhaving an annular depression around the base of said dome, an insertedseating portionof soft material in said depression substantially iiushwith the annularledge and with thesurface of the dome, a valve, stemhaving an annular flange around its lower portion, saidhead having ahollow portionfor accommodation of said annular flange, a followeradapted for securing, said flange within said head, and means forlocking said follower in said head, substantially as set forth.

In witness whereof, I have hereunto set my hand and seal at lVaynesboro, Pennsylvania, this 2nd day of March, A. D. nineteen hundredand twenty-two.

NORMAN M; SMALL.

